Preparation and study of IrO2/SiC–Si supported anode catalyst for high temperature PEM steam electrolysers

Aleksey Nikiforov, Antonio Luis Tomás García, Irina Petrushina, Erik Christensen, Niels Bjerrum

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A novel catalyst material for oxygen evolution electrodes was prepared and characterised by different techniques. IrO2 supported on a SiC–Si composite was synthesised by the Adams fusion method. XRD and nitrogen adsorption experiments showed an influence of the support on the surface properties of the IrO2 particles, affecting the IrO2 particle size. The prepared catalysts were electrochemically characterised by cyclic voltammetry experiments at 25,80,120 and 150 °C. In accordance with the observed variation in particle size, a support loading of up to 20% improved the activity of the catalyst. Powder conductivity measurements were also performed, which showed the influence of the support particles in the packing of IrO2 particles, perhaps favouring the formation of channels and pores between particles, thus increasing the catalyst utilisation.
Original languageEnglish
JournalInternational Journal of Hydrogen Energy
Volume36
Issue number10
Pages (from-to)5797-5805
ISSN0360-3199
DOIs
Publication statusPublished - 2011

Keywords

  • Inert anode
  • Oxygen electrode
  • Corrosion resistance
  • Catalyst support
  • PEM water electropysis

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